I've got a car with separate bulbs for high and low beams (9005/9006) and I also have a set of driving lights installed. My headlight switch has 3 positions: Off, parking lights, headlights & parking lights. With the headlights on, I have the option of low beams or high beams. While one is on, the other shuts off.
I would like the following behavior:
When the switch is turned onto the parking lights position, the driving lights come on as well. They would therefore also be on in the headlights position.
When I have the car's low beams on, only the low beams illuminate. But when I switch to high beams, the high beam lights come on in addition to the lows. This way I can still have the road in front of me lit up.
I have a standard automotive relay which I had been using for my driving lights before I swapped out my composite headlights this afternoon. I have since become confused as to the proper wiring of this relay.
30 is the +12V from the battery, yes? On which line should I connect the "trigger" wire from the parking lights? Is it 86, and then I connect the + line of the driving lights to 87? And 85 is ground?
The other reason I am posting this is to find out if there is a better way to achieve this behavior than using two relays independently wired.
Basically, if this were your car, how would you go about doing this?
Thanks!
This is a pretty easy set-up.
DRIVING LIGHTS--
30 = 12v from battery 87=output to driving lights 85= trigger from parking lights 86=either 12v or ground depending on the trigger (if the parking light wire is 12v, then 86= ground. If the parking light wire is ground, then 86=12v) 87a=not used
High beams--
Considering that both the high and low beam are positive trigger--
30=12v 87=output to lowbeam wire 85=trigger from high beam wire 86=ground 87a=not used
remember to always fuse 12v on 30
Considering that both high and low beam are negative trigger--
30=ground 87=output to low beam wire 85=trigger from hige beam wire 86=12v 87a=not used
Hopes this helps